Synthetic porous crystalline MCM-67, its synthesis and use

Abstract

This invention relates to a new synthetic porous crystalline material, designated MCM-67, a method for its preparation and use thereof in catalytic conversion of organic compounds. MCM-67 appears to be closely related in structure to VPI-8 and SSZ-41 but is synthesized without zinc and in the presence of manganese and/or cobalt ions.

What is claimed is: 
     
       1. A synthetic porous crystalline material which in its calcined form in characterized by an X-ray diffraction pattern including d-spacing and relative intensity values substantially as set forth in Table 1 of the specification and has a composition comprising the molar relationship YO 2  :(n)X 2  O 3  :(p)ZO wherein X is a trivalent element, Y is a tetravalent element and Z is cobalt and/or manganese; n is from 0 to 0.5 and p is from 0.0001 to 0.5; and the porous crystalline material does not contain zinc.     
     
     
       2. The crystalline material of claim 1 having a composition, on an anhydrous basis and in terms of moles of oxides per n moles of YO 2 , expressed by the formula: (0.1-2)M 2  O:(0.2-2)R:YO 2  :(n)X 2  O 3  :(p)ZO, wherein M is alkali or alkaline earth metal and R is an organic moiety.     
     
     
       3. The crystalline material of claim 2 wherein said R comprises a tetraethylammonium cation or a bis(cyclopentadienyl) cobalt(III) cation. 
     
     
       4. The crystalline material of claim 1 wherein X is a trivalent element selected from the group consisting of boron, iron, indium, gallium, aluminum, and a combination thereof; and Y is a tetravalent element selected from the group consisting of silicon, tin, germanium, and a combination thereof. 
     
     
       5. The crystalline material of claim 1 wherein Y comprises silicon. 
     
     
       6. A method of synthesizing crystalline material exhibiting a characteristic X-ray diffraction pattern including d-spacing and relative intensity values substantially as set forth in Table 1 which comprises (i) preparing a mixture capable of forming said material, said mixture comprising sources of alkali or alkaline earth metal (M), an oxide of trivalent element (X), an oxide of tetravalent element (Y), an oxide of cobalt or manganese (Z), water, and directing agent (R) comprising a tetraethylammonium cation or a bis(cyclopentadienyl) cobalt(III) cation, and having a composition, in terms of mole ratios, within the following ranges:   ______________________________________                                    
       YO.sub.2 /ZO  1-10,000                                             
  YO.sub.2 /X.sub.2 O.sub.3 >1                                            
  H.sub.2 O/YO.sub.2 10-1,000                                             
  OH.sup.- /YO.sub.2 0.05-1                                               
  M/YO.sub.2 0.05-2                                                       
  R/YO.sub.2 0.05-2                                                       
______________________________________                                    
     (ii) maintaining said mixture under sufficient conditions including a temperature of from 80° C. to about 250° C. until crystals of said material are formed; and (iii) recovering said crystalline material from step (ii).   
     
     
       7. The method of claim 6 wherein said mixture has the following composition ranges:   ______________________________________                                    
       YO.sub.2 /ZO                                                       
               5-200                                                      
  YO.sub.2 /X.sub.2 O.sub.3  5-100                                        
  H.sub.2 O/YO.sub.2  25-100                                              
  OH.sup.- /YO.sub.2 0.05-0.5                                             
  M/YO.sub.2 0.05-0.5                                                     
  R/YO.sub.2 0.05-0.4                                                     
______________________________________                                    
     
     
     
       8. The method of claim 6 wherein said mixture further comprises seed crystals in sufficient amount to enhance synthesis of said crystalline material. 
     
     
       9. The method of claim 6 wherein M comprises lithium. 
     
     
       10. A process for converting a feedstock comprising organic compounds to conversion product which comprises contacting said feedstock at organic compound conversion conditions with a catalyst comprising an active form of the synthetic porous crystalline material of claim 1.